<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		<style type="text/css">
			ul{
				width: 900px;
				height: 500px;
				background: #ccc;
				padding-top: 20px;
			}
			ul li {
				width:150px ;
				height: 100px;
				margin-left: 0;
				transition-property: margin-left;
				transition-delay: 1s;
				transition-duration: 6s;
				
			}
			ul li img {
				width: 150px;
			}
			ul li :nth-child(1) {
				transition-timing-function: linear;
			}
			ul li :nth-child(2) {
				transition-timing-function: ease; 
			}
			ul li :nth-child(3) {
				transition-timing-function: linear;
			}
			ul li :nth-child(4) {
				transition-timing-function: linear;
			}
			ul li :nth-child(5) {
				transition-timing-function: linear;
			}
		</style>
		
	</head>
	
	
	
	<body>
		<ul>
			<li> <img src="img/乌龟.png"></li>
			<li> <img src="img/乌龟.png"></li>
			<li> <img src="img/乌龟.png"></li>
			<li> <img src="img/乌龟.png"></li>
			<li> <img src="img/乌龟.png"></li>
		</ul>
	</body>
</html>
